Spring-buffer for ships



(No Model.)

0. 'MQALLISTER,

SPRING BUFFER FQR SHIPS.

Patented July .17, 1883".

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UNITED STATES PATENT OFFICE.

CHARLES MOALLISTER, OF PHILADELPHIA, PENNSYLVANIA.

SPRING-BUFFER FOR SHIPS.

SPECIFICATION forming part of Letters Patent No. 281,280, dated July 17, 1883.

Application filed December 6, 1882. (N0 model.)

To all whom it 11mg concern Be it known that I, CHARLES McALLIsrnR, of the city and county of Philadelphia, and State of Pennsylvania, have invented an Im provement in Buffers for Vessels, of which the following is a specification.

My invention has reference to buffers for vessels to protect them from abrasion when passing each other or when lying at the wharf; and it consists in providing the sides of the vessel with springpieces carrying rollers, and in details of construction, all of which are more fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

Heretofore it has been customary to use wooden logs hung by cords or woven cord, which are hung over the side of the vessel when there is any causeto fear abrasion. This, however, requires an extra hand on small boats, and when the danger arises suddenly and without previous warning it is too late forthe operator to get to the necessary part of the vessel.

The object of my invention is to so provide a vessel with suitable means whereby it shall at all times be in a condition to resist abrasion, and at the same time dispense entirely with manual labor.

In the drawings, Figurelis a sectional plan of my invention. Fig. 2 is a perspective, and shows how the same is applied to vessels; and Fig. 3 is a plan view of a vessel, and shows the arrangement of my improvemen thereon.

A represents t-he'side of the boat. B is my improved bufier-spring, which is pivoted to the vessels side at 0, close to one end, and has a slot, 0, on the other end, through which a bolt, D, passes, and prevents displacement of the spring, and yet allows it free play to exercise its functions. To prevent wearing on i the woodwork of the vessel a plate, E, may

The spring-buffers are arranged at certain distances along the vessel s side, and the rollers thereon automatically adjust themselves, so as to revolve freely, no matter whether the vessel is moving forward or backward, being rocked by thewaves or moving verticallywith the tides.

If desired, the rollers could be dispensed with, but I prefer them in all cases.

I do not limit myself to the exact construction shown, as it may be modified in various ways without departing from my invention.

1 am aware of the patents to Wacker, No. 146,494, January 13, 1874, and Hulster, No. 212,143, February 11, 1879, and claim nothing therein set forth or claimed.

Having now described myinvention, what I 2. A spring-buffer for vessels, which consists of a curved bow-spring provided at one end with means to secure it to the vessel, and at the other with means to allow of its compression, in combination with a rollerpivoted to said spring at or near its middle, substantially as set forth.

3. A spring-buffer for vessels, which consists of a curved spring provided at one end with a hole and at the other with a slot, in combination with a loosely-pivoted frame secured to said spring at or near its middle, and an anti-friction roller carried by Said frame, substantially as and for the purpose specified.

4. The combination of vessel A, spring B, sccured at G to the vessel, and having slot C at one end, bolt 1), frame F, pivoted to said spring, roller G in said frame, and plate E, substantially as and for the purpose specified.

In testimony of which invention 1 hereunto set my hand.

CHARLES MCALLISTER.

Witnesses: I

R. A. GAVIN, R. M. HUNTER. 

